How to filter audio datas???

Estou usando o LabView em meu trabalho de graduação. Preciso usar filtros(passa-baixas e passa-faixas) para filtrar os dados de áudio oriundos da placa de som. Infelizmente só consigo filtrar em tempo real utilizando o formato mono-16bits. Para os outros formatos, mono(8 bits) e stereo(8 e 16 Bits) não obtive sucesso.
Desenvolvemos nossos filtros, mas mesmo se usarmos o filtro ButterWorth(do próprio LabView), quer seja o FPB ou FPF, só conseguimos para o formato mono-16bits.
Agradeço a atenção.
Watts.

Watts;
Estou atachando dois arquivos a esta resposta. Um deles gera sinais sonoros mono e estereo. Na mesma VI, voce tem opção de equalização, oi que é filtragem.
Espero que ajude.
Atenciosamente
Filipe A.
Applications Engineer
National Instruments
Attachments:
Equalizer_Examples.zip ‏1787 KB
sound41_lib.zip ‏285 KB

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